Question
Asked Oct 15, 2019
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)
3:50
E3b. After we add some solid (NH,), PO, into a 100-mL 0.240 M
(NH4)2CO3 solution, the molarity of NH in the mixture is 0.840 M.
What is the molarity of PO
4
3+
ANDXOO
CE
15
DOT
MacBook Air
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) 3:50 E3b. After we add some solid (NH,), PO, into a 100-mL 0.240 M (NH4)2CO3 solution, the molarity of NH in the mixture is 0.840 M. What is the molarity of PO 4 3+ ANDXOO CE 15 DOT MacBook Air

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Step 1

The molarity of a solution is the ratio of number of moles of a substance to the volume of solution in liters. The expression for molarity is labelled in equation (1) in which M is the molarity, n is the number of moles of solute and  V is the volume in liters.

The relation between millilitres (mL) and liters (L) is written below:

1 mL= 0.001 L 

 

n
М-
V (L)
(1)
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n М- V (L) (1)

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Step 2

Convert 100 mL into liters by using equation (2).

100 mL = 0.100 L

 

The number of moles of ammonium carbonate is calculated below.

"(NH4),CO;
0.240 M
0.100L
0.240 M x 0.100 L
"(NH)CO
0.024 mol
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"(NH4),CO; 0.240 M 0.100L 0.240 M x 0.100 L "(NH)CO 0.024 mol

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Step 3

The number of moles of the mixt...

'mixture
0.840 M
0.100L
0.840 M x 0.100 L
misture
0.084 mol
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'mixture 0.840 M 0.100L 0.840 M x 0.100 L misture 0.084 mol

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